Lake Irma Dam Reservoir Report
Nearby: Banks Lake Dam Howell Lake Dam
Last Updated: December 12, 2025
Lake Irma Dam, located in Lanier, Georgia, is a local government-owned structure primarily used for recreation purposes.
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Summary
This earth dam, with a height of 13 feet and a length of 475 feet, impounds Mill Branch to create a surface area of 25 acres and a storage capacity of 377 acre-feet. The dam has a low hazard potential and a moderate risk assessment rating.
Despite not being regulated by the state, Lake Irma Dam undergoes regular inspections, with the last one conducted in March 2016. The dam has uncontrolled spillways and outlet gates, and its condition is currently not rated. While it does not have an Emergency Action Plan in place, the risk assessment deems it to have a moderate risk level. The dam, situated in a picturesque location, provides ample opportunities for water resource and climate enthusiasts to explore and enjoy the surrounding natural beauty.
Dam Length |
475 |
Dam Height |
13 |
River Or Stream |
MILL BRANCH |
Primary Dam Type |
Earth |
Surface Area |
25 |
Drainage Area |
6631 |
Nid Storage |
377 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
13 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Withlacoochee River At Mcmillan Rd
|
80cfs |
Alapaha River At Statenville
|
135cfs |
Alapaha River Near Alapaha
|
86cfs |
Withlacoochee River At Us 84
|
29cfs |
Little River Near Adel
|
20cfs |
Alapaha River Near Jennings Fla
|
255cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Lake Irma Dam